Petrol and diesel prices in Carmarthen

Cheapest petrol near Carmarthen right now: 171.9p at Texaco Vst Towy Services Station, reported 21:47 on 14 Oct. Petrol in Carmarthen averages 172.3p, 1.9p below the UK average. Cheapest diesel: 194.9p at Murco Tanerdy Garage. Diesel in Carmarthen averages 197.0p, 2.2p below the UK average.

  • Murco Tanerdy Garage showed 170.9p for petrol when it last reported, on 13 Oct. That price may have changed.
  • No town within 15 miles has cheaper petrol than Carmarthen's best price today.
  • Supermarket forecourts in Carmarthen average 173.4p for petrol, 1.5p more than other forecourts.
  • 1 of 7 forecourts here reported a petrol price in the last 3 days. Older prices show the date they were reported.
  • Carmarthen is in the Carmarthenshire council area, 41st cheapest of 354 for petrol in the council league table, averaging 171.8p.
Cheapest petrol near Carmarthen
Murco Tanerdy Garage 170.9p ¾ mi Tanerdy Garage, Carmarthen, SA31 2EY · reported 13 Oct Texaco Vst Towy Services Station 171.9p ¾ mi Towy Service Station, Caerfyrddin, SA31 2BN MFG Morrisons Carmarthen 171.9p 1½ mi Parc Pensarn, Carmarthen, SA31 2NF · reported 11 Oct Tesco Carmarthen Extra 172.9p 1 mi Tesco Stores, Caerfyrddin, SA31 3AX Murco Cks Supermarket 173.9p 1¼ mi C K's Supermarket, Carmarthen, SA31 3HL · reported 13 Oct

Distance in miles from Carmarthen town centre, as the crow flies. Showing stations within 3 miles.

Cheapest diesel near Carmarthen
Murco Tanerdy Garage 194.9p ¾ mi Tanerdy Garage, Carmarthen, SA31 2EY Texaco Vst Towy Services Station 196.9p ¾ mi Towy Service Station, Caerfyrddin, SA31 2BN MFG Morrisons Carmarthen 196.9p 1½ mi Parc Pensarn, Carmarthen, SA31 2NF · reported 11 Oct Tesco Carmarthen Extra 197.9p 1 mi Tesco Stores, Caerfyrddin, SA31 3AX Murco Cks Supermarket 198.9p 1¼ mi C K's Supermarket, Carmarthen, SA31 3HL · reported 13 Oct

Distance in miles from Carmarthen town centre, as the crow flies. Showing stations within 3 miles.

Average petrol in Carmarthen172.3p−1.9p vs UK average
Average diesel in Carmarthen197.0p−2.2p vs UK average
Cheapest vs dearest petrol£2.50on a 50-litre tank in Carmarthen

Price trend

We started recording daily average prices in Carmarthen on 16 October 2026. The trend chart appears here once there are a few days of data.

Not in central Carmarthen?

Enter your postcode to sort stations by price, best value once the drive is counted, or distance.

All petrol stations in Carmarthen

7 petrol stations with a Carmarthen address, cheapest petrol first.

StationPetrolDieselReported
Murco Gwalia GarageGwalia Garage, Carmarthen, SA32 7DR 169.9p194.9p 14 Oct
Murco Derwydd ServicesDerwydd Garage, Carmarthen, SA33 6TP 170.9p195.9p 14 Oct
Murco Tanerdy GarageTanerdy Garage, Carmarthen, SA31 2EY 170.9p194.9p 14 Oct
MFG Morrisons CarmarthenParc Pensarn, Carmarthen, SA31 2NF · Open 24 hours 171.9p196.9p 11 Oct
Valero Ascona Tenby Road Service StationLysonnen Road, Carmarthen, SA33 5DT · Open 24 hours 173.9p197.9p 16 Oct
Murco Cks SupermarketC K's Supermarket, Carmarthen, SA31 3HL 173.9p198.9p 13 Oct
Asda White Mill Express PetrolA40, Carmarthen, Carmarthen, SA32 7EN 174.9p199.9p 28 Sept

Supermarket fuel prices in and near Carmarthen

1 Morrisons, 1 Tesco and 1 Asda forecourts within 5 miles of Carmarthen, cheapest petrol first.

StationPetrolDieselMiles
MFG Morrisons CarmarthenParc Pensarn, Carmarthen, SA31 2NF 171.9p196.9p1
Tesco Carmarthen ExtraTesco Stores, Caerfyrddin, SA31 3AX 172.9p197.9p<1
Asda White Mill Express PetrolA40, Carmarthen, Carmarthen, SA32 7EN 174.9p199.9p3

24-hour petrol stations in Carmarthen

2 stations sell fuel 24 hours a day in Carmarthen, cheapest petrol first. Shop hours can be shorter; check the station page.

StationPetrolDieselMiles
MFG Morrisons CarmarthenParc Pensarn, Carmarthen, SA31 2NF 171.9p196.9p1
Valero Ascona Tenby Road Service StationLysonnen Road, Carmarthen, SA33 5DT 173.9p197.9p3

Super unleaded, premium diesel and AdBlue in Carmarthen

Super unleaded (E5)

5 stations in and around Carmarthen sell super unleaded (e5), averaging 182.7p a litre. The cheapest is Murco Gwalia Garage at 178.5p.

Premium diesel

2 stations in and around Carmarthen sell premium diesel, averaging 206.0p a litre. The cheapest is Murco Tanerdy Garage at 205.5p.

AdBlue

AdBlue at the pump at MFG Morrisons Carmarthen, Valero Ascona Tenby Road Service Station and Oil 4 Wales Ltd Nantycaws.

Fuel price alerts for Carmarthen

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Fuel prices in nearby towns

Caerfyrddin1 milesCarmarthen Road8 milesPencader8 milesPontyates9 milesTenby Road, St Clears9 milesKidwelly9 milesSt Clears9 milesGorslas11 miles

Fuel prices across Carmarthenshire · All towns in Wales

Questions about fuel prices in Carmarthen

Where is the cheapest petrol in Carmarthen?

Today the cheapest petrol near Carmarthen is 171.9p a litre at Texaco Vst Towy Services Station, Towy Service Station, Caerfyrddin, SA31 2BN.

How much is diesel in Carmarthen today?

Diesel averages 197.0p a litre across 7 forecourts in Carmarthen, against a UK average of 199.2p.

Which supermarket has the cheapest petrol in Carmarthen?

MFG Morrisons Carmarthen is cheapest at 171.9p a litre, 1 miles from the centre. We compare 3 supermarket forecourts in and near Carmarthen above.

How up to date are these prices?

Forecourts report their prices to the government's Fuel Finder scheme and we refresh them twice a day. These were last updated 17:30 on 16 Oct. Each forecourt's table row shows the day its price was reported.

Is there a 24-hour petrol station in Carmarthen?

Yes. MFG Morrisons Carmarthen and Valero Ascona Tenby Road Service Station sell fuel 24 hours a day.